Misc cleanup / lint removal

added backend-side support for on-the-fly operational attributes; added hasSubordinates to schema and back-ldbm

	SLAP_MR_ASSERTION_SYNTAX_MATCH
	SLAP_MR_VALUE_SYNTAX_MATCH
	SLAP_MR_VALUE_SYNTAX_CONVERTED_MATCH,
add supporting evaluation macros, and update code as needed.
Misc other code cleanup included.

fix misinitialized UNDEFINED attribute type; reordered members of AttributeType because I don't know a portable way to statically initialize a mutex :)

indexing.

when found in config file, or before first call to dn_normalize/dn_validate

type.  Add type to core.schema.  Not yet populated on add nor checked on modify.

macros in ldap_pvt.h.

an undefined matched.  unrecognized objectIdentifer in OID form
shall result in false match.

subclass of stored value.

Needs work.  Volunteers welcomed.

	Don't depend acl parsing upon slap_schema, it's filled in post-conf